<docs>
---
order: 0
title: 照片墙
---

用户可以上传图片并在列表中显示缩略图。当上传照片数到达限制后，上传按钮消失。

</docs>
<template>
    <div class="clearfix">
        <j-upload
            v-model:file-list="fileList"
            action="https://www.mocky.io/v2/5cc8019d300000980a055e76"
            list-type="picture-card"
            @preview="handlePreview"
        >
            <div v-if="fileList.length < 8">
                <plus-outlined />
                <div style="margin-top: 8px">添加图片</div>
            </div>
        </j-upload>
        <j-modal
            :visible="previewVisible"
            :title="previewTitle"
            :footer="null"
            @cancel="handleCancel"
        >
            <img alt="example" style="width: 100%" :src="previewImage" />
        </j-modal>
    </div>
</template>
<script lang="ts">
import { PlusOutlined } from '@ant-design/icons-vue';
import { defineComponent, ref } from 'vue';
import type { UploadProps } from 'ant-design-vue';

function getBase64(file: File) {
    return new Promise((resolve, reject) => {
        const reader = new FileReader();
        reader.readAsDataURL(file);
        reader.onload = () => resolve(reader.result);
        reader.onerror = (error) => reject(error);
    });
}

export default defineComponent({
    components: {
        PlusOutlined,
    },
    setup() {
        const previewVisible = ref(false);
        const previewImage = ref('');
        const previewTitle = ref('');

        const fileList = ref<UploadProps['fileList']>([
            {
                uid: '-1',
                name: 'image.png',
                status: 'done',
                url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
            },
            {
                uid: '-2',
                name: 'image.png',
                status: 'done',
                url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
            },
            {
                uid: '-3',
                name: 'image.png',
                status: 'done',
                url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
            },
            {
                uid: '-4',
                name: 'image.png',
                status: 'done',
                url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
            },
            {
                uid: '-xxx',
                percent: 50,
                name: 'image.png',
                status: 'uploading',
                url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
            },
            {
                uid: '-5',
                name: 'image.png',
                status: 'error',
            },
        ]);

        const handleCancel = () => {
            previewVisible.value = false;
            previewTitle.value = '';
        };
        const handlePreview = async (file: UploadProps['fileList'][number]) => {
            if (!file.url && !file.preview) {
                file.preview = (await getBase64(file.originFileObj)) as string;
            }
            previewImage.value = file.url || file.preview;
            previewVisible.value = true;
            previewTitle.value =
                file.name || file.url.substring(file.url.lastIndexOf('/') + 1);
        };

        return {
            previewVisible,
            previewImage,
            fileList,
            handleCancel,
            handlePreview,
            previewTitle,
        };
    },
});
</script>
<style>
/* you can make up upload button and sample style by using stylesheets */
.ant-upload-select-picture-card i {
    font-size: 32px;
    color: #999;
}

.ant-upload-select-picture-card .ant-upload-text {
    margin-top: 8px;
    color: #666;
}
</style>
